Condensed Consolidated Balance Sheets Parenthetical - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Allowance for Doubtful Accounts Receivable, Current	$ 1,943	$ 8,739
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	1,000	1,000
Preferred stock, $0.001 par value, 1,000 shares authorized, none issued and outstanding	$ 0	$ 0
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Common stock, shares authorized (in shares)	70,000,000	70,000,000
Common stock, shares issued (in shares)	39,712,000	39,756,000
Common stock, shares outstanding (in shares)	39,712,000	39,756,000